Motors Technical Information
It is important to select the motor that will help assure optimum performance of the equipment to be driven. To do this, a motor must be selected that is capable of starting the equipment, bringing it up to operating speed, and driving it at the necessary loading speed as long as required without excessive heating. The following motor specifications should be considered.
Review the chart below to determine what category of motor is needed.
Category | Common Applications | Common Motor Types |
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General Purpose |
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Definite / |
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HVAC |
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Tip: Some motors can be used for multiple applications
Measurement of how much work is done in a specific amount of time. This value indicates the power output of the motor and usually is specified as a fraction or in a whole number. Small motors can be rated in watts.
Tip: Select a motor with equal or greater horsepower to the existing motor. Tip: If no HP or Watt rating is available, amp draw (typically available on the nameplate) provides the next best characteristic to sizing the motor.
Revolutions per minute (RPM) indicate how fast the motor shaft will rotate under the specified load (HP). Multi-speed motors can be rated either with the RPM and the number of speeds (1075/3-speed) or with the RPM for each speed .
Poles and RPM are used interchangeably. Reference the chart below.
Poles | Synchronous RPM | Typical Nameplate RPM |
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2 | 3600 | 3000-3450 |
4 | 1800 | 1625-1750 |
6 | 1200 | 1050-1140 |
8 | 900 | 825-850 |
Tip: Match RPM within 5% of nameplate RPM.
Tip: Remember that the horsepower (HP) rating of the motor only applies to the high speed of a multi-speed motor. As the speed is reduced, the horsepower is reduced.
NEMA (National Electrical Manufacturers Association) along with electric motor member companies established a NEMA Premium® energy efficiency motors program to provide highly energy efficient products that meet the needs and applications of users based on a consensus definition of ′′premium efficiency′′ and use of the NEMA Premium® logo for premium products.
Choosing a motor with the NEMA Premium® logo will identify higher efficient motors that will save money in total energy operating cost and improve system reliability.
For more information about the NEMA Premium® efficiency motor program, go to www.nema.org/premiummotors.com.
Voltage is the power rating at which the motor is designed to operate. A motor should operate at plus or minus 10% of nameplate voltage. A 230 volt motor should operate over a range of 207 volts to 253 volts. A slash (/) between listed voltages indicates there is a different connection for these voltages. A hyphen (-) between voltages listed usually indicates the same connection is used for these voltages. (No plus or minus 10%.)
Tip: Match to supplied voltage.
Tip: If the supplied voltage is 115, and the replacement motor is 115/230, the motor will work, if connected for 115 volts.
The term hertz or frequency was formally called “cycles�? and is nearly always 60 hertz in the USA and Canadian applications. Some foreign countries, especially Europe use 50 hertz power supplies.
Tip: Match Hz exactly or with a 50/60 capable motor.
Select the motor type based on typical characteristics and uses.
Motor Type | Hp Range | Typical Nameplate Rpm | Typical Characteristics | Typical Uses |
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Shaded Pole, Single Phase | Up to 1/2 HP | Multi-Speed, 1050, 1550, 3000 |
| Small Fans and Blowers, Unit Heaters, Space Heaters, Humidifiers, Freezer Blowers, Window Fans, Floor Fans, Portable Evaporative Coolers |
Permanent Split Capacitor (PSC), Single Phase | Up to 1 HP | Multi-Speed, 825, 1075, 1625, 3250 |
| Small Mounted Fans, Air Circulators, Blowers, Room AC and Central AC, Condenser Fans, Evaporator Fans, Furnace Blowers, Unit Heaters, Window Fans, Oil Burners, Pool Pump, Door Operators, Animal Confinement Fans for: Poultry, Hogs, Cattle |
Split Phase, Single Phase | Up to 1 HP | 850, 1140, 1725, 3450 |
| Belted Fans, Blowers, AC Fans, Blowers, Office Machines, Small Centrifugal Pumps, Home Appliances, Door Operators, Oil Burners, Poultry Feeders, Attic Fans, Furnace Blowers, Small Tools, Lathes |
Capacitor Start, Single Phase | 1/6 to 10 HP | 850, 1140, 1725, 3450 |
| Compressors, Conveyors, Pumps, Augers, Machine Tools, Grain Stirrers, Ventilation Fans, Food Equipment, Barn Cleaners, Vacuum Pumps, Manure Pumps, Milk Coolers, Elevators, Cattle Feeders |
Three Phase | 1/4 HP and Up | 850, 1140, 1725, 3450 |
| Compressors, Conveyors, Pumps, Augers, Machine Tools, Grain Stirrers, Ventilation Fans, Food Equipment, Barn Cleaners, Vacuum Pumps, Manure Pumps, Milk Coolers, Elevators, Cattle Feeders, Drying Fans, Gear Motors |
Select the motor type based on the operating environment.
Environment | Type | Typical Description |
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Clean, Dry, Indoor, Non-Hazardous | OAO Open Air Over | Vent openings in shell and/or end shields must be located in air stream to provide motor cooling. |
| ODP Open Drip Proof | Vent openings that are placed so drops of liquid falling within an angle of 15 degrees from vertical will not affect performance. |
Dirty, Damp, Outdoor, Non-Hazardous | TEFC Totally Enclosed Fan Cooled | No vent openings in shell or end shield. Includes an external fan that blows cooling air over the motor frame. |
| TENV Totally Enclosed Non Vented | No vent openings in shell or end shield. Depends on convection air for cooling. |
| TEAO Totally Enclosed Air Over | No vent openings in shell or end shield. Depends on airflow from driven device for motor cooling. Must be loaded in air stream. |
Hazardous Explosion-Proof | TEFC/TENV | No vent openings in shell or end shields. Designed to withstand an internal explosion of specified gases or vapors and not allow the internal flame or explosion to escape. |
Tip: A totally enclosed motor can replace an open motor assuming other characteristics meet the application requirements.
Mounting is the way a motor mounts to the application. This is usually determined by the application itself, how the motor is to be used, and where it will be mounted. Below are some of the typical mounting configurations:
Motor is isolated from base by rubber rings on the end shield
Motor base is welded or bolted directly to motor shell
Tabs are welded to bottom of motor shell for bolting to a fan column or bracket
End shield has holes for mounting
End shield has holes for mounting, with base
Rubber rings on each end shield. No base
Extended thru-bolts (studs) for mounting
Tip: Many times the frame designation helps identify the way the motor is mounted (56C = C-Face)
A temperature-sensing device built into the motor that shuts off the motor if the temperature becomes excessive due to failure-to-start or overloading.
Automatic Reset Thermal Overload Protector (auto) - after motor cools, thermal protector automatically restores power.
Should not be used where unexpected restarting would be hazardous.
Manual Reset Thermal Overload Protector (man) - An external button must be pushed to restore power to motor.
Preferred where unexpected restarting would be hazardous, as on saws, conveyors, compressors, etc.
If the motor does not have thermal protection, then the nameplate will be blank or will show non protected “none�?.
Tip: It is important to match the thermal protection to the motor that is being replaced.
Bearings support the rotating parts of the motor. They are usually either ball or sleeve.
Tip: Sleeve: Used on fractional HP motors with low to moderate loads. Ball: Used where a higher load capacity is required.
A measure of the reserve margin built into a motor. Motors rated over 1.0 SF have more than normal margin, and are used where unusual conditions such as occasional high or low voltage, momentary overloads, etc., are likely to occur.
Tip: Always match the service factor with the same or higher.
The insulation class refers to the class of insulation and related components used in the motor. These are rated by standard NEMA classifications according to the motor’s maximum operating temperatures.
Tip: Keep in mind, each 10° C rise above the ratings can reduce the life of the motor by half.
Tip: Under normal conditions a replacement motor should have a class equal to or higher than the original. If the replacement is a lower rating, it could cause premature failure.
CLASS | TOTAL TEMPERATURE OF SYSTEM |
---|---|
A | 105°C (221°F) |
B | 130°C (266°F) |
F | 155°C (311°F) |
H | 180°C (356°F) |
(Maximum Allowable Operating Temperature)
Frame size is defined by NEMA (National Electrical Manufacturers Association). See NEMA Chart below.
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Frame | AH | U | EM | EL | EN | AK | R | S |
143 | 41�?�4 | 7�?�8 | 1 | 15�?�32 | 3�?�8-16 x.75 | 41�?�2 | 49�?�64 | 3�?�16 |
145 | 41�?�4 | 7�?�8 | 1 | 15�?�32 | 3�?�8-16 x.75 | 41�?�2 | 49�?�64 | 3�?�16 |
182 | 41�?�4 | 7�?�8 | 1 | 11�?�4 | 3�?�8-16 x.75 | 41�?�2 | 49�?�64 | 3�?�16 |
184 | 41�?�4 | 7�?�8 | 1 | 11�?�4 | 3�?�8-16 x.75 | 41�?�2 | 49�?�64 | 3�?�16 |
213 | 41�?�4 | 7�?�8 | 1 | 11�?�4 | 3�?�8-16 x.75 | 81�?�2 | 49�?�64 | 3�?�16 |
215 | 41�?�4 | 7�?�8 | 1 | 11�?�4 | 3�?�8-16 x.75 | 81�?�2 | 49�?�64 | 3�?�16 |
254 | 51�?�4 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 81�?�2 | 17�?�64 | 1�?�4 |
256 | 51�?�4 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 81�?�2 | 17�?�64 | 1�?�4 |
284 | 51�?�4 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 121�?�2 | 17�?�64 | 1�?�4 |
286 | 51�?�4 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 121�?�2 | 17�?�64 | 1�?�4 |
324 | 51�?�4 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 121�?�2 | 17�?�64 | 1�?�4 |
326 | 51�?�4 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 121�?�2 | 17�?�64 | 1�?�4 |
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Frame | AH | U | EM | EL | EN | AK | R | S |
143 | 75�?�16 | 7�?�8 | 1 | 15�?�32 | 3�?�8-16 x.75 | 41�?�2 | 49�?�64 | 3�?�16 |
145 | 75�?�16 | 7�?�8 | 1 | 15�?�32 | 3�?�8-16 x.75 | 41�?�2 | 49�?�64 | 3�?�16 |
182 | 75�?�16 | 7�?�8 | 1 | 11�?�4 | 3�?�8-16 x.75 | 41�?�2 | 49�?�64 | 3�?�16 |
184 | 75�?�16 | 11�?�4 | 1 | 11�?�4 | 3�?�8-16 x.75 | 41�?�2 | 49�?�64 | 3�?�16 |
213 | 81�?�8 | 11�?�4 | 13�?�8 | 13�?�4 | 3�?�8-16 x.75 | 81�?�2 | 17�?�64 | 1�?�4 |
215 | 81�?�8 | 11�?�4 | 13�?�8 | 13�?�4 | 3�?�8-16 x.75 | 81�?�2 | 17�?�64 | 1�?�4 |
254 | 81�?�8 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 81�?�2 | 17�?�64 | 1�?�4 |
256 | 81�?�8 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 81�?�2 | 17�?�64 | 1�?�4 |
284 | 81�?�8 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 121�?�2 | 17�?�64 | 1�?�4 |
286 | 81�?�8 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 121�?�2 | 17�?�64 | 1�?�4 |
324 | 81�?�8 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 121�?�2 | 17�?�64 | 1�?�4 |
326 | 81�?�8 | 11�?�4 | 13�?�8 | 13�?�4 | 1�?�2-13 x 1.00 | 121�?�2 | 17�?�64 | 1�?�4 |
364 | 81�?�8 | 15�?�8 | 13�?�4 | 21�?�8 | 1�?�2-13 x 1.00 | 121�?�2 | 113�?�32 | 3�?�8 |
365 | 81�?�8 | 15�?�8 | 13�?�4 | 21�?�8 | 1�?�2-13 x 1.00 | 121�?�2 | 113�?�32 | 3�?�8 |
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Frame | AJ | AK | BA | BB Min. | BC | BD Max. | Number | Tap Size | Bolt Penetration | U | AH | R | S |
42C | 33�?�4 | 3 | 21�?�16 | 1�?�8 | -0.19 | 5 | 4 | 1�?�4-20 | - | 3�?�8 | 15�?�16 | 21�?�64 | flat |
48C | 33�?�4 | 3 | 21�?�2 | 1�?�8 | -0.19 | 55�?�8 | 4 | 1�?�4-20 | - | 1�?�2 | 111�?�16 | 29�?�64 | flat |
56C | 57�?�8 | 41�?�2 | 23�?�4 | 1�?�8 | -0.19 | 61�?�2 | 4 | 3�?�8-16 | - | 5�?�8 | 21�?�16 | 33�?�64 | 3�?�16 |
143TC & 145TC | 57�?�8 | 41�?�2 | 23�?�4 | 1�?�8 | 0.12 | 61�?�2 | 4 | 3�?�8-16 | 9�?�16 | 7�?�8 | 21�?�8 | 49�?�64 | 3�?�16 |
182TC & 184TC | 71�?�4 | 81�?�2 | 31�?�2 | 1�?�4 | +0.12 | 9 | 4 | 1�?�2-13 | 3�?�4 | 11�?�8 | 25�?�8 | 63�?�64 | 1�?�4 |
182TCH & 184TCH | 57�?�8 | 81�?�2 | 31�?�2 | 1�?�8 | +0.12 | 61�?�2 | 4 | 3�?�8-16 | 9�?�16 | 11�?�8 | 25�?�8 | 63�?�64 | 1�?�4 |
213TC & 215TC | 71�?�4 | 41�?�2 | 41�?�4 | 1�?�4 | +0.12 | 9 | 4 | 1�?�2-13 | 3�?�4 | 13�?�8 | 31�?�8 | 113�?�64 | 5�?�16 |
254TC & 256TC | 71�?�4 | 81�?�2 | 43�?�4 | 1�?�4 | +0.25 | 10 | 4 | 1�?�2-13 | 3�?�4 | 15�?�8 | 33�?�4 | 113�?�32 | 3�?�8 |
284TC & 286TC | 9 | 81�?�2 | 43�?�4 | 1�?�4 | +0.25 | 111�?�4 | 4 | 1�?�2-13 | 3�?�4 | 17�?�8 | 43�?�8 | 119�?�32 | 1�?�2 |
284TSC & 286TSC | 9 | 101�?�2 | 43�?�4 | 1�?�4 | +0.25 | 111�?�4 | 4 | 1�?�2-13 | 3�?�4 | 15�?�8 | 3 | 113�?�32 | 3�?�8 |
324TC & 326TC | 11 | 101�?�2 | 51�?�4 | 1�?�4 | +0.25 | 14 | 4 | 5�?�8-11 | 15�?�16 | 21�?�8 | 5 | 127�?�32 | 1�?�2 |
324TSC & 326TSC | 11 | 121�?�2 | 51�?�4 | 1�?�4 | +0.25 | 14 | 4 | 5�?�8-11 | 15�?�16 | 17�?�8 | 31�?�2 | 119�?�32 | 1�?�2 |
364TC & 365TC | 11 | 121�?�2 | 57�?�8 | 1�?�4 | +0.25 | 14 | 4 | 5�?�8-11 | 15�?�16 | 23�?�8 | 55�?�8 | 21�?�64 | 5�?�8 |
364TSC & 365TSC | 11 | 121�?�2 | 57�?�8 | 1�?�4 | +0.25 | 14 | 8 | 5�?�8-11 | 15�?�16 | 17�?�8 | 31�?�2 | 119�?�32 | 1�?�2 |
404TC & 405TC | 11 | 121�?�2 | 65�?�8 | 1�?�4 | +0.25 | 151�?�2 | 8 | 5�?�8-11 | 15�?�16 | 27�?�8 | 7 | 229�?�64 | 3�?�4 |
404TSC & 405TSC | 11 | 121�?�2 | 65�?�8 | 1�?�4 | +0.25 | 151�?�2 | 8 | 5�?�8-11 | 15�?�16 | 21�?�8 | 4 | 127�?�32 | 1�?�2 |
444TC & 445TC | 14 | 16 | 71�?�2 | 1�?�4 | +0.25 | 18 | 8 | 5�?�8-11 | 15�?�16 | 33�?�8 | 81�?�4 | 27�?�8 | 7�?�8 |
444TSC & 445TSC | 14 | 16 | 71�?�2 | 1�?�4 | +0.25 | 18 | 8 | 5�?�8-11 | 15�?�16 | 23�?�8 | 41�?�2 | 21�?�64 | 5�?�8 |
447TC & 449TC | 14 | 16 | 71�?�2 | 1�?�4 | +0.25 | 18 | 8 | 5�?�8-11 | 15�?�16 | 33�?�8 | 81�?�4 | 27�?�8 | 7�?�8 |
447TSC & 449TSC | 14 | 16 | 71�?�2 | 1�?�4 | +0.25 | 18 | 8 | 5�?�8-11 | 15�?�16 | 23�?�8 | 41�?�2 | 21�?�64 | 5�?�8 |
5000 Frame Series | 141�?�2 | 161�?�2 | - | 1�?�4 | +0.25 | 18 | 4 | 5�?�8-11 | 15�?�16 | - | - | - | - |
Frame Designation | A Max. | D | E | 2F | BA | H | U | N-W | V Min. | Keyseat R S | AA Min. | |
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42 | - | 2 5/8 | 1 3/4 | 1 11/16 | 2 1/16 | 9/32 slot | 3/8 | 1 1/8 | - | 2 1/64 | flat | - |
48 | - | 3 | 2 1/8 | 2 3/4 | 2 1/2 | 11/32 slot | 1/2 | 1 1/2 | - | 29/64 | flat | - |
48H | - | 3 | 2 1/8 | 4 3/4 | 2 1/2 | 11/32 slot | 1/2 | 1 1/2 | - | 29/64 | flat | - |
56 | - | 3 1/2 | 2 7/16 | 3 | 2 3/4 | 11/32 slot | 5/8 | 1 7/8 | - | 33/64 | 3/16 | - |
56H | - | 3 1/2 | 2 7/16 | 5 | 2 3/4 | 11/32 slot | 5/8 | 1 7/8 | - | 33/64 | 3/16 | - |
143T | 7 | 3 1/2 | 2 3/4 | 4 | 2 1/4 | 11/32 hole | 7/8 | 2 1/4 | 2 | 49/64 | 3/16 | 3/4 |
145T | 7 | 3 1/2 | 2 3/4 | 5 | 2 1/4 | 11/32 hole | 7/8 | 2 1/4 | 2 | 49/64 | 3/16 | 3/4 |
182 | 9 | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 13/32 hole | 7/8 | 2 1/4 | 2 | 49/64 | 3/16 | 3/4 |
184 | 9 | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 13/32 hole | 7/8 | 2 1/4 | 2 | 49/64 | 3/16 | 3/4 |
182T | 9 | 4 1/2 | 3 3/4 | 4 1/2 | 2 3/4 | 13/32 hole | 1 1/8 | 2 3/4 | 2 1/2 | 63/64 | 2 1/2 | 3/4 |
184T | 9 | 4 1/2 | 3 3/4 | 5 1/2 | 2 3/4 | 13/32 hole | 1 1/8 | 2 3/4 | 2 1/2 | 63/64 | 2 1/2 | 3/4 |
213 | 10 1/2 | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 13/32 hole | 1 1/8 | 3 | 2 3/4 | 63/64 | 2 1/2 | 3/4 |
215 | 10 1/2 | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 13/32 hole | 1 1/8 | 3 | 2 3/4 | 63/64 | 2 1/2 | 3/4 |
213T | 10 1/2 | 5 1/4 | 4 1/4 | 5 1/2 | 3 1/2 | 13/32 hole | 1 3/8 | 3 3/8 | 3 1/8 | 1 13/64 | 5/16 | 1 |
215T | 10 1/2 | 5 1/4 | 4 1/4 | 7 | 3 1/2 | 13/32 hole | 1 3/8 | 3 3/8 | 3 1/8 | 1 13/64 | 5/16 | 1 |
254U | 12 1/2 | 6 1/4 | 5 | 8 1/4 | 4 1/4 | 17/32 hole | 1 3/8 | 3 3/4 | 3 1/2 | 1 13/64 | 5/16 | 1 |
256U | 12 1/2 | 6 1/4 | 5 | 10 | 4 1/4 | 17/32 hole | 1 3/8 | 3 3/4 | 3 1/2 | 1 13/64 | 5/16 | 1 |
254T | 12 1/2 | 6 1/4 | 5 | 8 1/4 | 4 1/4 | 17/32 hole | 1 5/8 | 4 | 3 3/4 | 1 13/32 | 3/8 | 1 1/4 |
256T | 12 1/2 | 6 1/4 | 5 | 10 | 4 1/4 | 17/32 hole | 1 5/8 | 4 | 3 3/4 | 1 13/32 | 3/8 | 1 1/4 |
284U | 14 | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 17/32 hole | 1 5/8 | 4 7/8 | 4 5/8 | 1 13/32 | 3/8 | 1 1/4 |
286U | 14 | 7 | 5 1/2 | 11 | 4 3/4 | 17/32 hole | 1 5/8 | 4 7/8 | 4 5/8 | 1 13/32 | 3/8 | 1 1/4 |
284T | 14 | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 17/32 hole | 1 7/8 | 4 5/8 | 4 3/8 | 1 19/32 | 1/2 | 1 1/2 |
286T | 14 | 7 | 5 1/2 | 11 | 4 3/4 | 17/32 hole | 1 7/8 | 4 5/8 | 4 3/8 | 1 19/32 | 1/2 | 1 1/2 |
284TS | 14 | 7 | 5 1/2 | 9 1/2 | 4 3/4 | 17/32 hole | 1 5/8 | 3 1/4 | 3 | 1 13/32 | 3/8 | 1 1/2 |
286TS | 14 | 7 | 5 1/2 | 11 | 4 3/4 | 17/32 hole | 1 5/8 | 3 1/4 | 3 | 1 13/32 | 3/8 | 1 1/2 |
324U | 16 | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 21/32 hole | 1 7/8 | 5 5/8 | 5 3/8 | 1 19/32 | 1/2 | 1 1/2 |
326U | 16 | 8 | 6 1/4 | 12 | 5 1/4 | 21/32 hole | 1 7/8 | 5 5/8 | 5 3/8 | 1 19/32 | 1/2 | 1 1/2 |
324US | 16 | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 21/32 hole | 1 5/8 | 3 1/4 | 3 | 1 13/32 | 3/8 | 1 1/2 |
326US | 16 | 8 | 6 1/4 | 12 | 5 1/4 | 21/32 hole | 1 5/8 | 3 1/4 | 3 | 1 13/32 | 3/8 | 1 1/2 |
324T | 16 | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 21/32 hole | 2 1/8 | 5 1/4 | 5 | 1 27/32 | 1/2 | 2 |
326T | 16 | 8 | 6 1/4 | 12 | 5 1/4 | 21/32 hole | 2 1/8 | 5 1/4 | 5 | 1 27/32 | 1/2 | 2 |
324TS | 16 | 8 | 6 1/4 | 10 1/2 | 5 1/4 | 21/32 hole | 1 7/8 | 3 3/4 | 3 1/2 | 1 19/32 | 1/2 | 2 |
326TS | 16 | 8 | 6 1/4 | 12 | 5 1/4 | 21/32 hole | 1 7/8 | 3 3/4 | 3 1/2 | 1 19/32 | 1/2 | 2 |
364U | 18 | 9 | 7 | 11 1/4 | 5 7/8 | 21/32 hole | 2 1/8 | 6 3/8 | 6 1/8 | 1 27/32 | 1/2 | 2 |
365U | 18 | 9 | 7 | 12 1/4 | 5 7/8 | 21/32 hole | 2 1/8 | 6 3/8 | 6 1/8 | 1 27/32 | 1/2 | 2 |
364US | 18 | 9 | 7 | 11 1/4 | 5 7/8 | 21/32 hole | 1 7/8 | 3 3/4 | 3 1/2 | 1 19/32 | 1/2 | 2 |
365US | 18 | 9 | 7 | 12 1/4 | 5 7/8 | 21/32 hole | 1 7/8 | 3 3/4 | 3 1/2 | 1 19/32 | 1/2 | 2 |
364T | 18 | 9 | 7 | 11 1/4 | 5 7/8 | 21/32 hole | 2 3/8 | 5 7/8 | 5 5/8 | 2 1/64 | 5/8 | 3 |
365T | 18 | 9 | 7 | 12 1/4 | 5 7/8 | 21/32 hole | 2 3/8 | 5 7/8 | 5 5/8 | 2 1/64 | 5/8 | 3 |
364TS | 18 | 9 | 7 | 11 1/4 | 5 7/8 | 21/32 hole | 1 7/8 | 3 3/4 | 3 1/2 | 1 19/32 | 1/2 | 3 |
365TS | 18 | 9 | 7 | 12 1/4 | 5 7/8 | 21/32 hole | 1 7/8 | 3 3/4 | 3 1/2 | 1 19/32 | 1/2 | 3 |
404U | 20 | 10 | 8 | 12 1/4 | 6 5/8 | 26/32 hole | 2 3/8 | 7 1/8 | 6 7/8 | 2 1/64 | 5/8 | 2 |
Frame Designation | A Max. | D | E | 2F | BA | H | U | N-W | V Min. | Keyseat R S | AA Min. | |
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405U | 20 | 10 | 8 | 13 3/4 | 6 5/8 | 26/32 hole | 2 3/8 | 7 1/8 | 6 7/8 | 2 1/64 | 5/8 | 2 |
404US | 20 | 10 | 8 | 12 1/4 | 6 5/8 | 26/32 hole | 2 1/8 | 4 1/4 | 4 | 1 7/8 | 1/2 | 2 |
405US | 20 | 10 | 8 | 13 3/4 | 6 5/8 | 26/32 hole | 2 1/8 | 4 1/4 | 4 | 1 7/8 | 1/2 | 2 |
404T | 20 | 10 | 8 | 13 3/4 | 6 5/8 | 26/32 hole | 2 7/8 | 7 1/4 | 7 | 2 29/64 | 3/4 | 3 |
405T | 20 | 10 | 8 | 12 1/4 | 6 5/8 | 26/32 hole | 2 7/8 | 7 1/4 | 7 | 2 29/64 | 3/4 | 3 |
404TS | 20 | 10 | 8 | 13 3/4 | 6 5/8 | 26/32 hole | 2 1/8 | 4 1/4 | 4 | 1 27/32 | 1/2 | 3 |
405TS | 20 | 10 | 8 | 12 1/4 | 6 5/8 | 26/32 hole | 2 1/8 | 4 1/4 | 4 | 1 27/32 | 1/2 | 3 |
444U | 22 | 11 | 9 | 13 3/4 | 7 1/2 | 26/32 hole | 2 7/8 | 8 5/8 | 8 3/8 | 2 29/64 | 3/4 | 2 1/2 |
445U | 22 | 11 | 9 | 14 1/2 | 7 1/2 | 26/32 hole | 2 7/8 | 8 5/8 | 8 3/8 | 2 29/64 | 3/4 | 2 1/2 |
444US | 22 | 11 | 9 | 16 1/2 | 7 1/2 | 26/32 hole | 2 1/8 | 4 1/4 | 4 | 1 27/32 | 1/2 | 2 1/2 |
445US | 22 | 11 | 9 | 14 1/2 | 7 1/2 | 26/32 hole | 2 1/8 | 4 1/4 | 4 | 1 27/32 | 1/2 | 2 1/2 |
444T | 22 | 11 | 9 | 16 1/2 | 7 1/2 | 26/32 hole | 3 3/8 | 8 1/2 | 8 1/4 | 2 7/8 | 7/8 | 3 |
445T | 22 | 11 | 9 | 14 1/2 | 7 1/2 | 26/32 hole | 3 3/8 | 8 1/2 | 8 1/4 | 2 7/8 | 7/8 | 3 |
447T | 22 | 11 | 9 | 16 1/2 | 7 1/2 | 26/32 hole | 3 3/8 | 8 1/2 | 8 1/4 | 2 7/8 | 7/8 | 3 |
449T | 22 | 11 | 9 | 20 | 7 1/2 | 26/32 hole | 3 3/8 | 8 1/2 | 8 1/4 | 2 7/8 | 7/8 | 3 |
444TS | 22 | 11 | 9 | 25 | 7 1/2 | 26/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | 3 |
445TS | 22 | 11 | 9 | 14 1/2 | 7 1/2 | 26/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | 3 |
447TS | 22 | 11 | 9 | 16 1/2 | 7 1/2 | 26/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | 3 |
449TS | 22 | 11 | 9 | 20 | 7 1/2 | 26/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | 3 |
5004 | 25 | 12 1/2 | 10 | 25 | 8 1/2 | 30/32 hole | 3 7/8 | 11 5/8 | 11 1/4 | 3 5/16 | 1 | - |
5004G | 25 | 12 1/2 | 10 | 16 | 8 1/2 | 30/32 hole | 3 1/2 | 10 1/2 | 10 2/8 | 3 | 7/8 | - |
5004S | 25 | 12 1/2 | 10 | 16 | 8 1/2 | 30/32 hole | 2 7/8 | 5 3/4 | 5 1/2 | 2 29/64 | 3/4 | - |
5004SS | 25 | 12 1/2 | 10 | 16 | 8 1/2 | 30/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | - |
5006L | 28 1/2 | 12 1/2 | 10 | 16 | 8 1/2 | 30/32 hole | 4 7/8 | 14 5/8 | 14 3/8 | 4 11/64 | 1 1/4 | - |
5006S | 28 1/2 | 12 1/2 | 10 | 20 | 8 1/2 | 30/32 hole | 2 7/8 | 5 3/4 | 5 1/2 | 2 29/64 | 3/4 | - |
5006MS | 28 1/2 | 12 1/2 | 10 | 20 | 8 1/2 | 30/32 hole | 3 3/8 | 6 3/4 | 6 1/2 | 2 7/8 | 7/8 | - |
5008 | 25 | 12 1/2 | 10 | 20 | 8 1/2 | 30/32 hole | 3 7/8 | 11 5/8 | 11 1/4 | 3 5/16 | 1 | - |
5008G | 25 | 12 1/2 | 10 | 25 | 8 1/2 | 30/32 hole | 3 1/2 | 10 1/2 | 10 2/8 | 3 | 7/8 | - |
5008L | 28 1/2 | 12 1/2 | 10 | 25 | 8 1/2 | 30/32 hole | 4 7/8 | 14 5/8 | 14 3/8 | 4 11/64 | 1 1/4 | - |
5008S | 25 | 12 1/2 | 10 | 25 | 8 1/2 | 30/32 hole | 2 7/8 | 5 3/4 | 5 1/2 | 2 29/64 | 3/4 | - |
5008S | 28 1/2 | 12 1/2 | 10 | 25 | 8 1/2 | 30/32 hole | 2 7/8 | 5 3/4 | 5 1/2 | 2 29/64 | 3/4 | - |
5008MS | 28 1/2 | 12 1/2 | 10 | 25 | 8 1/2 | 30/32 hole | 3 3/8 | 6 3/4 | 6 1/2 | 2 56/64 | 7/8 | - |
5008SS | 25 | 12 1/2 | 10 | 25 | 8 1/2 | 30/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | - |
5008SS | 28 1/2 | 12 1/2 | 10 | 25 | 8 1/2 | 30/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | - |
5010L | 28 1/2 | 12 1/2 | 10 | 32 | 8 1/2 | 30/32 hole | 4 7/8 | 14 5/8 | 14 3/8 | 4 11/64 | 1 1/4 | - |
5010S | 28 1/2 | 12 1/2 | 10 | 32 | 8 1/2 | 30/32 hole | 2 7/8 | 5 3/4 | 5 1/2 | 2 29/64 | 3/4 | - |
5010MS | 28 1/2 | 12 1/2 | 10 | 32 | 8 1/2 | 30/32 hole | 3 3/8 | 6 3/4 | 6 1/2 | 2 7/8 | 7/8 | - |
5010SS | 28 1/2 | 12 1/2 | 10 | 32 | 8 1/2 | 30/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | - |
5012L | 28 1/2 | 12 1/2 | 10 | 40 | 8 1/2 | 30/32 hole | 4 7/8 | 14 5/8 | 14 3/8 | 4 11/64 | 1 1/4 | - |
5012S | 28 1/2 | 12 1/2 | 10 | 40 | 8 1/2 | 30/32 hole | 2 7/8 | 5 3/4 | 5 1/2 | 2 29/64 | 3/4 | - |
5012MS | 28 1/2 | 12 1/2 | 10 | 40 | 8 1/2 | 30/32 hole | 3 3/8 | 6 3/4 | 6 1/2 | 2 7/8 | 7/8 | - |
5012SS | 28 1/2 | 12 1/2 | 10 | 40 | 8 1/2 | 30/32 hole | 2 3/8 | 4 3/4 | 4 1/2 | 2 1/64 | 5/8 | - |